Remove reachable NOTREACHED() in CreateChildUIAndValueNodesIfNeeded().

It is an overly strong assertion.

Bug: chromium:1278307
Change-Id: I90af28aa1ab3781b8dab875447360ed66dae2770
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/87870
Auto-Submit: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/xfa/fxfa/parser/cxfa_node.cpp b/xfa/fxfa/parser/cxfa_node.cpp
index 1029e46..53cbabf 100644
--- a/xfa/fxfa/parser/cxfa_node.cpp
+++ b/xfa/fxfa/parser/cxfa_node.cpp
@@ -2887,7 +2887,6 @@
         widget_type = XFA_FFWidgetType::kRectangle;
         break;
       default:
-        NOTREACHED();
         break;
     }
   }